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Terms like xyx and the absence of an operator between it and 7 suggest that some symbols are missing.
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x=2ab+7 x= 2(3)(5) +7 x=30+7 x=37
x2+3x = 7 x2+3x-7 = 0 Using the quadratic equation formula:- x = -4.541381265 or x = 1.541381265
The formula is 6n + 7 where n is the nth term So 8th term would be (6 x 8) + 7 = 48 + 7 = 55
y= x/7 for example x=30 days y=? then y=30/7=4 week and 2 days